in a way, it's like michelle obama and ann romney. michelle obama had a tougher job because she was telling us about somebody we already know and know well. there was a lot of paint on that canvas already. ann romney was telling us about someone that we didn't know well. so she had a fresh canvas to work with. tonight, we know barack obama. we know he gives great speeches. that's not what we need from him tonight. if he just does the same thing he always does, people stay where they already are. what does he have to do? this speech will actually be judged on substance. he has to say, look, we're going to take the country in a different direction. 70% of americans think this country's on the wrong track. let me tell you what's going to be different the next four years. i think that boils down to economic responsibility. >> alex castellano, thank you so much for being with us. i know you had a long night last night. >> a good one. >> a good one, yeah. thank you, alex. cnn's primetime coverage of the democratic national convention contin